Convert Opus Audio Codec (.opus) to iPhone Audio (.iphone-audio) online for free. Fast, secure audio conversion with no watermarks or registration.
Upload your .opus file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .m4a file when it's ready.
The iPhone Audio preset optimizes Opus files for Apple's iPhone ecosystem. While iPhones can decode Opus within Safari and certain WebKit-based apps, the native Music app, Files app, Voice Memos, and most third-party audio players do not recognize .opus files. The iPhone Audio preset produces an M4A file with AAC-LC at 256 kbps — the same format and bitrate that Apple uses for iTunes Store music purchases — ensuring flawless playback, sharing, and system integration on every iPhone model.
Opus is the voice codec powering Discord, WhatsApp calls, and WebRTC. When you save voice messages from these platforms, the resulting .opus files sit unusable in your iPhone's file system. This preset converts them into the format iPhones handle best, with proper metadata support for the Music app, Siri integration, CarPlay playback, and Apple Watch streaming.
iPhones are the most common scenario for Opus-to-native conversion. Users regularly download Opus voice messages from Telegram, export Discord recordings, or receive WebRTC audio files that their iPhone refuses to play. The .opus extension is not registered in iOS's UTType system, meaning the Files app shows no playback controls and the Share sheet offers limited options.
Converting to M4A/AAC unlocks the full iPhone audio experience: inline playback in Messages and Mail, AirPlay to HomePod and Apple TV, CarPlay integration, Apple Watch sync, Siri voice commands ("Hey Siri, play my voice recording"), Lock Screen controls, and Control Center audio widgets. The M4A format also supports chapter markers, artwork, and lyrics metadata that the Music app displays beautifully.
FFmpeg decodes Opus audio (libopus, 48 kHz) and encodes to AAC-LC at 256 kbps with 44.1 kHz sample rate in an M4A (MPEG-4) container. The AAC-LC profile is chosen for maximum iPhone compatibility dating back to the original iPhone (2007). The constant bitrate mode ensures consistent streaming behavior over CarPlay and Bluetooth connections. The M4A container includes Apple's metadata atoms for proper Music app integration.
At 256 kbps AAC, the output is perceptually transparent. This is the same quality as iTunes Store purchases, which Apple considers reference quality for consumer audio. Opus sources at typical bitrates (64-256 kbps) are preserved with no audible quality difference. Even audiophile listeners cannot reliably distinguish 256 kbps AAC from lossless in controlled tests.
| Device | Opus | iPhone Audio |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
The iPhone Audio preset transforms incompatible Opus files into native M4A/AAC that leverages every iPhone audio feature — from CarPlay to Apple Watch to HomePod streaming. At 256 kbps, the quality matches Apple's own music store standard.
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| No |
| الميزة | Opus | iPhone Audio |
|---|---|---|
| الاسم الكامل | Opus Audio Codec | iPhone Compatible Audio |
| الامتداد | .opus | .m4a |
| الأفضل لـ | Low latency | iPhone optimized |